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1.3 Drifting Continents

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Vocabulary

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Pangaea-means''all lands''-or that all the continents were together
Continental drift-contenents slowly moving
fossil-any trace of an ancient organism that is preserved in rock

Outline

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Intro

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• Africa and South America look like jigsaw puzzles

The Theory of the Continental Drift

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• 1910 Alford Wegener
  • hypothesis was that the continents were once joined together
    • 300 million years ago

Evidence from landforms

• mountains
  • lined up with South America and Argentina
• coalfields
  • European coalfields with North America

Evidence from fossils

• found common dinosaur and plant fossils on different continents

Evidence from climate

• Current continents have different(scrambled) glacial deposits

Scientist Reject Wegner's Theory

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• lacked an explanation about how continents drifted